For the whole thing:
Our
Scamp was a teenager when we bought it. It was well taken care of, but also well used.
My daughter took a handheld carpet steamer and steamed the entire rat fur surface in our 19. It was like night and day.
We are in a dry climate and ran the fan to get lots of airflow after the steam. I would be careful in a more humid climate and may rely more on spot cleaning.